Jesus summoned the crowd again and said to them,
“Hear me, all of you, and understand.
Nothing that enters one from outside can defile that person;
but the things that come out from within are what defile.”
When he got home away from the crowd
his disciples questioned him about the parable.
He said to them,
“Are even you likewise without understanding?
Do you not realize that everything
that goes into a person from outside cannot defile,
since it enters not the heart but the stomach
and passes out into the latrine?”
(Thus he declared all foods clean.)
“But what comes out of the man, that is what defiles him.
From within the man, from his heart,
come evil thoughts, unchastity, theft, murder,
adultery, greed, malice, deceit,
licentiousness, envy, blasphemy, arrogance, folly.
All these evils come from within and they defile.”
7:19 all foods clean: An editorial comment by Mark. Since Jesus traces true defilement back to the heart (7:21), the outward distinctions between clean and unclean as defined by the Old Covenant are no longer operative or binding in the New. These ceremonial distinctions have been superseded in two ways: (1) Ritual defilement was an external matter under the Old Covenant, whereas the New Covenant penetrates to cleanse and govern the inward life of believers (Mt 5:8; Acts 15:9). (2) Since Mosaic food laws effectively separated Israel from the Gentiles, these dietary restrictions were set aside in the New Covenant once Jews and Gentiles were gathered together into the same covenant family. The early Church grappled much with the issues surrounding Old Covenant dietary laws and table-fellowship in light of the gospel (Acts 10:9–16; Rom 14:13–23; Gal 2:11–16; CCC 582).
7:21 the heart of man: In biblical terminology, the heart is the center of the person and the source of every decision that manifests itself through deeds. Jesus thus links true defilement with the heart, where evil actions and intentions have their hidden beginning (Mt 5:28). His inventory of vices is similar to others in the NT (Rom 1:29–31; Gal 5:19–21; 1 Pet 4:3; CCC 1432, 2517–19).
Friends, in today’s Gospel Jesus explains that sinful behavior flows from within our hearts. How often the Bible speaks of the “heart.” By that it means the core of the self, the deepest center of who we are, that place from which our thoughts and actions arise. God wants to penetrate that heart, so that he is the center of our souls. But there is something terribly black in the human heart. We are made in the image and likeness of God, but that image can be so distorted by sin as to be barely recognizable.
Our faith clearly teaches the awful truth of the fall, and we see the evidence of it in the mystery of sin, which is not to be ignored, not to be trifled with, not to be rationalized away. We are all capable of dark and evil acts. I’m not OK and neither are you. We see the tangled web which is sin. It grows like a fungus or like a cancer.
Have our hearts become hardened, so that God cannot get in? Is there a deep resistance in us to grace?
– Bishop Robert Barron
May the virtues of faith, hope, and love go with you today – DV.
 Curtis Mitch, “Introduction to the Gospels,” in The Ignatius Catholic Study Bible: The New Testament (San Francisco: Ignatius Press, 2010), 78.